Evidence and implications for exciton dissociation in lead halide perovskitesVandana Tiwari, Hong-Guang Duan, Ajay Jha, Pabitra K. Nayak, Michael Thorwart, Henry J. Snaith and R. J. Dwayne MillerEPJ Web Conf., 205 (2019) 06018DOI: https://doi.org/10.1051/epjconf/201920506018